March 14—aka Pi Day—isn’t just for math nerds. It’s the one day a year where we celebrate the magic of the number π (pi), which starts at 3.14 and goes on forever. But Pi Day isn’t just about ...

Friday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its diameter and equals 3.14... Schools and museums often plan events to ...

Egyptians believed that the pyramids of Giza were like math marvels, built on the principles of pi. The fun fact about this ...

Add Yahoo as a preferred source to see more of our stories on Google. This number-themed day dates back to 1988, when physicist Larry Shaw decided to host a circle walk to honor the mathematical π ...

This article has been updated from the original post, which appeared on March 14, 2013. March 14, when written as 3/14, represents the first three digits of pi (π), the ratio of the circumference of a ...